Improvement in thresholds



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PATENT OFFICE.

FREDERIC H. MOORE AND NATHANIEL D. WHITNEY, OF BOSTON, MASS.

IMPROVEMENT IN THREsHoLDs.

o Specication forming part of Letters Patent No. 155,807, dated October13, 1874 application filed July 24,1874.

To all whom it may concern:

Be it known that we, FREDERIC H. MOORE and NATHANIEL D. WHITNEY, both ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented an Improved Door-Threshold, of which the following is aspecification Our invention consists in improving a doorthreshold (moreespecially an inside doorthreshold) by making it in the form of a rod,and placing it above and upon the iioor, di` rectly beneath the doorwhen closed, and also in fastening it, preferably at each end, in such amanner that it can be removed at will.

The thresholds in ordinary use are generally l made of wood or marble,permanently attached to the lloor, and of a width which embraces thewhole of the door-jamb. They are liable to scratch by wear, and becomeunsightly, requiring constant care and attention to keep them in order;whereas our threshold `can be readily removed for cleansing, and, fromits small size, is scarcely perceived when'the door is closed, as thecarpet or floorcovering is carried quite up to the threshold on eitherside. It has little surface to wear, and will last a long time beforeany abrasion can be perceived.

We prefer to make the threshold round and of metal; but it may be ofother forms, or 1ionade of other materials, such as wood or rub- In thedrawings, we have shown several methods of securing our threshold to thefloor, those being the best that have occurred to us 5 but other Waysmay be adopted.

Figure 1 shows a cylindrical rod, A, running across the door B from onedoor-jamb, C, to the other, O.

Figs. 2, 3, and 4 show a rod where a portion of its end at O is cut awayto allow of its being tted to a recess, a, cut in a plate set in thedoor-jamb, the end at G being fitted with a spring-spindle, d, enteringthe jamb, and a retractingpin, c, operating through a groove cut in theside of the rod. The spring may in some cases be dispensed with, andonly the spindle used, with the retracting-pin. This device operates bylocking the end of the rod A into the recess a, and locking the spindlecl into the jamb C.

Figs. 5, 6, and 7 show a method of locking the rod when its end at Oenters the jamb, and the spring-spindle afterward forces the other endinto the jamb G and holds it there.

Figs. 8 and 9 show another mode of locking the rod, where a clasp, g',is pivoted to the jamb, and embraces the top of the rod, the friction ofits end against the side of the rabbet holding it in place.

Fig. 10 shows at m a hinged clasp, which, when turned up, releases therod, 4and when turned down holds it firmly.

Figs. l0 and 11 show methods of fastening the center of the rod by meansof grooves and pins k, should it ever be found necessary to prevent themfrom springing; but a groove in the floor will generally answer thepurpose.

We claim as 'our invention- The rod A, in combination with the jambs C Cand the lioor, substantially as described.

FREDERIC H. MOORE.

N. D. WHITNEY.

Witnesses J. BROWN LORD, GHAs. F. SLEEPER.

